Obtaining the digital certificate is necessary for the consultant to have independence and flexibility of schedules when carrying out administrative procedures. The steps to be taken are indicated on the following website of the Currency and Stamp Factory.

It is reduced to three steps: request it online, where we will receive a password, go to an authorized administrative office where we will identify ourselves and download again online.


To complete the first step, we will have to connect to the aforementioned internet address (http://www.cert.fnmt.es) and click on the "Certificate Request" link to take us to the page where you are requesting us. that we introduce our DNI / NIF when a user certificate is requested, your browser generates a pair of keys. The private key is saved in your browser and the public key is sent to the FNMT-RCM to sign it, which will constitute the corresponding certificate. The FNMT-RCM will assign an application code to this key and will notify us so that we can present it in the accreditation.
Important: If we change the computer or browser before obtaining the certificate we will have lost the private key and we will not be able to make digital signatures, even if we receive the certificate later.


Once the application code has been obtained, we will have to appear at any authorized Administration office (see the list on the website), to prove our identity by providing, along with the application code that we generated in the previous section, our DNI / NIF.


When we have accredited to the Accreditation Office we will reconnect to the aforementioned internet address (http://www.cert.fnmt.es) and enter the link entitled "Download the certificate" for once we enter our ID / NIF and our application code proceed to download the certificate. Once downloaded, we will have to click on the "Install" button. Very important: we can only download the certificate from the same computer and browser from which we request it.

If all the process has been correct, we will have installed our digital signature on our computer and we will be able to start using it in the applications that are prepared for it. If we want to check if we have it installed, we will follow the following steps:

  • Go to the 'Tools' menu.
  • Select 'Internet Options'.
  • Select the 'Content' tab.
  • Under 'Certificates' press the button.
  • An entry with your name will appear.


To make a backup copy of the Certificate in the 'Tools' menu of the Browser, Internet Options, Content, select the certificate and press the export button, from that moment a Windows assistant will guide us.
Note: For the certificate to be exportable it is necessary to check the check box that says "Mark private key as exportable" or "Export private key". Then we must protect it with a password and tell it the path of the file in which we want to save it.


The certificate has 3 years validity.
The renewal can be made two months before the certificate expires. If you do not know its expiration date, you can check it from the computer where the certificate is installed by accessing https://www.cert.fnmt.es/index.php?cha=cit&sec=8&fpage=1&lang=en

With this process of electronic renewal you do not need to go to any registration office, but if you do not renew the certificate before it expires you will have to request it again repeating the process that was carried out at the time.
The renewal process consists of two steps:

  1. Renewal application, accessing http://www.cert.fnmt.es/index.php?cha=cit&sec=5&lang=en , in the section "" REQUEST FOR RENOVATION "that you will find in the menu on the left. You will obtain a 9-digit code that you must print or write to proceed with the download of your renewed certificate in step 2.
  2. Download the renewed certificate, (after 24 hours since you completed step 1 of the renewal application), access http://www.cert.fnmt.es/index.php?cha=cit&sec=5&fpage=3&lang=en
    Additionally, if you wish, you can modify your personal data, including the address of the email account associated with the certificate.

Information prepared by Enrique Bravo